Replication job fails every Saturday

Hello,

I've setup a replication job of SQL cluster between production and disaster recovery site.

The job runs flawlessly except from all Saturdays at 7 in the morning. I'm using Replication Manager 5.4 (SP4) under Windows 2008 R2.

The error log is the following one:

2013 11 16 08:06:05 WBCLUSTER-NODE2  INFO:Replicator sessions are 37% completed

2013 11 16 08:06:20 WBCLUSTER-NODE2  INFO:Replicator sessions are 37% completed

2013 11 16 08:06:35 WBCLUSTER-NODE2  INFO:Replicator sessions are 37% completed

2013 11 16 08:06:50 WBCLUSTER-NODE2  INFO:Replicator sessions are 00% completed

2013 11 16 08:07:06 WBCLUSTER-NODE2 002024 ERROR:Failed to query replication status, error is: NBS Err:NBSSVR_DPRQST_InfoRecordNotFound.

2013 11 16 08:07:06 WBCLUSTER-NODE2  INFO:Replicator sessions are 00% completed

2013 11 16 08:07:06 WBCLUSTER-NODE2 000618 ERROR:Replication Manager was unable to unmark the Incremental SAN Copy session fs300_T3_LUN0_CKM00115100658_fs275_T10_LUN0_CKM00115100657 on array NBS Err:NBSSVR_DPRQST_SnapNotMarkedReplica.  Make sure selected source or target LUN(s) are not in SnapView Clone Synchronized state.

2013 11 16 08:07:06 WBCLUSTER-NODE2 026084 ERROR:Storage Services operation PostExecuteReplication failed with an error as follows: Storage Services has terminated with an error.

2013 11 16 08:07:06 WBCLUSTER-NODE2 026084 ERROR:Storage Services operation postExecute failed with an error as follows: Storage Services has terminated with an error.

Has anyone else faced the same issue? Any help would be greatly appreciated.

Thank you